You can transfer OST to PST file both by using manual method or by using a third party tool like Stellar Converter for OST. Let me walk you through both the processes.
For the manual method you have to simply use Outlook itself to convert your OST file to PST. Follow these steps to convert OST file to PST manually:
Launch Microsoft Outlook and ensure it’s connected to the Exchange server linked to your OST file.
- Go to File > Open & Export > Import/Export.
- In the Import and Export Wizard, select Export to a file and click Next.
- Select PST Format.
- Select the mailbox or specific folders you want to export from the OST data and click Next.
- Specify a location and name for the new PST file, then click Finish. You can optionally set a password for the PST file.
- Open the saved PST file in Outlook to confirm that all your data has been transferred successfully.
However, as stated earlier this process is only applicable when your OST file is connected to the Exchange Server. But if your OST file is inaccessible and is not connected to the Exchange server, this is when a third party tool like Stellar Converter for OST is required. This tool is also quite easy to use. I have personally used it and have seen that the UI and UX is quite easy to use for a non tech person like me. This tool can seamlessly convert large OST file which is inaccessible or disconnected from the exchange server to PST will 100% accuracy keeping all your mailbox data intact. This tool can automatically detect the configured OST file in your system to convert it to PST file. Alternatively, you can also manually select your OST file to be converted to PST file. After conversion, this tool allows you to preview all your mailbox data before you can save it into PST format. Apart from this, the tool also exports your OST file to various formats like EML, RTF, PDF, MSG, HTML and MBOX. This tool’s batch file conversion allows you to convert multiple OST files at once saving you quite an amount of time. Apart from this, this tool can export your converted mailbox directly to Office 365 profile.
So, by using these processes you can easily transfer your OST file into PST file. However, I would personally suggest you use Stellar converter for OST as it would be a one stop solution for all your needs. Moreover, this software is one of the best in the market and is preferred by MVPs and users alike.